A source close to Amanda tells Us Weekly, "[Amanda] ended it. She had had enough. Her friends didn't trust him. Everyone thought he was using her for celebrity. He was not good, and she was over it. It was definitely her who ended it."

Seeing as he dated Lauren Conrad before he upgraded to Amanda, we totally believe it!

However, Doug told the mag just two days ago, "Amanda's great...she's an awesome girl. We're having a lot of fun...we were just in the Bahamas, and we spent Christmas together...everything's really solid."

Doug may be nice to look at, but it sounds like he's deep in denial, and we think Amanda can do waaaay better than him. And kudos to her for ending things with this media hungry loser!